Which maps with TT Go720T

I have a TT Go720T and would like to know what are the newest version maps that I can use.
I have some older v825 & v900 maps that work, but it seems that newer ones will not work even after using FastActivate.exe.

Hi Quin, I've tried most of them but I can not seen to get them to work.
I download them, unpack them, put them on my TT and then run the FastActivate but they are not working.
Am i missing a step or doing something wrong/not doing something.
With older maps (pre v900.) I just put them on the TT and then run the hack.
Does the fact that I'm running the TomTom Work NavCore make any difference?.

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